Difference between revisions of "HiFiBerry Amp 2"

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{{ Part
+
#REDIRECT [[HiFiBerry Amp2]]
| modality = Audio
 
| manufacturer = HiFiBerry
 
| interface = HAT
 
| link = https://www.hifiberry.com/shop/boards/hifiberry-amp2/
 
| datasheet = https://www.hifiberry.com/docs/data-sheets/datasheet-amp2/
 
}}
 
 
 
The HiFiBerry Amp 2 is an integrated [[Is Component::amplifier]] and [[Is Component::sound card]] [[Has Interface::HAT]] for the [[Raspberry Pi]] capable of playing audio at 24 bits/192kHz.
 
 
 
== Configuration ==
 
 
 
Note that the following is encapsulated in the autopilot script ''hifiberry'', which can be executed with
 
 
 
<pre>python -m autopilot.setup.run_script hifiberry</pre>
 
 
 
=== Device Tree ===
 
 
 
In '''/boot/config.txt''', remove or comment out the following to disable the built-in audio<ref>https://www.hifiberry.com/docs/software/configuring-linux-3-18-x/</ref>:
 
 
 
<pre>dtparam=audio=on</pre>
 
 
 
And add the line:
 
 
 
<pre>dtoverlay=hifiberry-dacplus</pre>
 
 
 
=== ALSA ===
 
 
 
Optionally, you can make the card the default sound-card for ALSA by creating a ''/etc/asound.conf'' file with the following
 
 
 
<pre>
 
pcm.!default {
 
  type hw card 0
 
}
 
ctl.!default {
 
  type hw card 0
 
}
 
</pre>
 
 
 
== GPIO Usage ==
 
 
 
The following pins are reserved and can't be used for other purposes<ref>https://www.hifiberry.com/docs/hardware/gpio-usage-of-hifiberry-boards/</ref>:
 
 
 
{| class="wikitable"
 
! Board Pins !! BCM # !! Use
 
|-
 
| 3, 5 || 2, 3 || I2C Configuration
 
|-
 
| 12, 35, 38, 40 || 18-21 || Sound interface
 
|-
 
| 7 || 4 || Mute -- pulling low mutes (so pull it up!)
 
|}
 
 
 
== Specs ==
 
 
 
Recommend powering with an 18V power supply!
 
 
 
{| class="wikitable"
 
|Recommended operating voltage || 12-20V ||
 
|-
 
|Absolute maximum operating voltage||24V||
 
|-
 
|Maximum output power||60W||
 
|-
 
|THD+N||<0.02%||typical, output power 0.1-10W
 
|-
 
|SNR||104db||typical
 
|-
 
|Frequency response||20-20000Hz||output filter characteristics depending on specific speaker parameters
 
|-
 
|Typical output power per channel||14W||Vsupply=12V, Rspk = 4Ohm, THD+N <0.1%
 
|-
 
|||18W||Vsupply=18V, Rspk = 4Ohm, THD+N <0.1%
 
|-
 
|||20W||Vsupply=24V, Rspk = 4Ohm, THD+N <0.1%
 
|-
 
|||8W||Vsupply=12V, Rspk = 8Ohm, THD+N <0.1%
 
|-
 
|||17W||Vsupply=18V, Rspk = 8Ohm, THD+N <0.1%
 
|-
 
|||28W||Vsupply=24V, Rspk = 8Ohm, THD+N <0.1%
 
|-
 
|Maximum output power per channel||15W||Vsupply=12V, Rspk = 4Ohm, THD+N <10%
 
|-
 
|||30W||Vsupply=18V, Rspk = 4Ohm, THD+N <10%
 
|-
 
|||44W||Vsupply=24V, Rspk = 4Ohm, THD+N <10%
 
|-
 
|||10W||Vsupply=12V, Rspk = 8Ohm, THD+N <10%
 
|-
 
|||20W||Vsupply=18V, Rspk = 8Ohm, THD+N <10%
 
|-
 
|||38W||Vsupply=24V, Rspk = 8Ohm, THD+N <10%
 
|-
 
|Sample rates||44.1-192kHz||
 
|}
 

Latest revision as of 03:52, 2 July 2021

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